QmlDesigner: Improve internal property

Remove useless lookups and make the code more clear. An enumeration
instead of virtual functions defines now the property type.

Change-Id: I5dc8704bdb24553e7b9c818562ea1c8de8ae2153
Reviewed-by: Vikas Pachdha <vikas.pachdha@qt.io>

src/plugins/qmldesigner/designercore/include/abstractproperty.h

@@ -79,6 +79,8 @@ public:
     bool isSignalHandlerProperty() const;
     bool isSignalDeclarationProperty() const;
 
+    PropertyType type() const;
+
     bool isDynamic() const;
     TypeName dynamicTypeName() const;
 
@@ -124,7 +126,7 @@ public:
 protected:
     AbstractProperty(const PropertyName &propertyName, const Internal::InternalNodePointer &internalNode, Model* model, AbstractView *view);
     AbstractProperty(const Internal::InternalPropertyPointer &property, Model* model, AbstractView *view);
-    Internal::InternalNodePointer internalNode() const;
+    Internal::InternalNodePointer internalNode() const { return m_internalNode; }
     Internal::ModelPrivate *privateModel() const;
 
 private:

src/plugins/qmldesigner/designercore/model/abstractproperty.cpp

@@ -51,11 +51,6 @@ AbstractProperty::AbstractProperty(const AbstractProperty &property, AbstractVie
 
 AbstractProperty::~AbstractProperty() = default;
 
-Internal::InternalNodePointer AbstractProperty::internalNode() const
-{
-    return m_internalNode;
-}
-
 Internal::ModelPrivate *AbstractProperty::privateModel() const
 {
     return m_model ? m_model->d.get() : nullptr;
@@ -295,6 +290,17 @@ bool AbstractProperty::isSignalDeclarationProperty() const
     return false;
 }
 
+PropertyType AbstractProperty::type() const
+{
+    if (!isValid())
+        return PropertyType::None;
+
+    if (internalNode()->hasProperty(name()))
+        return internalNode()->property(name())->propertyType();
+
+    return PropertyType::None;
+}
+
 bool AbstractProperty::isBindingProperty() const
 {
     if (!isValid())

src/plugins/qmldesigner/designercore/model/bindingproperty.cpp

@@ -48,16 +48,15 @@ void BindingProperty::setExpression(const QString &expression)
     if (expression.isEmpty())
         return;
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isBindingProperty()
-            && internalProperty->toBindingProperty()->expression() == expression)
-
+    if (auto internalProperty = internalNode()->property(name())) {
+        auto bindingProperty = internalProperty->to<PropertyType::Binding>();
+        //check if oldValue != value
+        if (bindingProperty && bindingProperty->expression() == expression)
             return;
-    }
 
-    if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isBindingProperty())
-        privateModel()->removePropertyAndRelatedResources(internalNode()->property(name()));
+        if (!bindingProperty)
+            privateModel()->removePropertyAndRelatedResources(internalProperty);
+    }
 
     privateModel()->setBindingProperty(internalNode(), name(), expression);
 }
@@ -340,20 +339,19 @@ void BindingProperty::setDynamicTypeNameAndExpression(const TypeName &typeName,
     if (typeName.isEmpty())
         return;
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isBindingProperty()
-            && internalProperty->toBindingProperty()->expression() == expression
-            && internalProperty->toBindingProperty()->dynamicTypeName() == typeName) {
-
+    if (auto internalProperty = internalNode()->property(name())) {
+        auto bindingProperty = internalProperty->to<PropertyType::Binding>();
+        //check if oldValue != value
+        if (bindingProperty && bindingProperty->expression() == expression
+            && internalProperty->dynamicTypeName() == typeName) {
             return;
         }
+
+        if (!bindingProperty)
+            privateModel()->removePropertyAndRelatedResources(internalProperty);
     }
 
-    if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isBindingProperty())
-        privateModel()->removePropertyAndRelatedResources(internalNode()->property(name()));
-
-     privateModel()->setDynamicBindingProperty(internalNode(), name(), typeName, expression);
+    privateModel()->setDynamicBindingProperty(internalNode(), name(), typeName, expression);
 }
 
 QDebug operator<<(QDebug debug, const BindingProperty &property)

src/plugins/qmldesigner/designercore/model/internalbindingproperty.cpp

@@ -6,8 +6,9 @@
 namespace QmlDesigner {
 namespace Internal {
 
-InternalBindingProperty::InternalBindingProperty(const PropertyName &name, const InternalNodePointer &propertyOwner)
-    : InternalProperty(name, propertyOwner)
+InternalBindingProperty::InternalBindingProperty(const PropertyName &name,
+                                                 const InternalNodePointer &propertyOwner)
+    : InternalProperty(name, propertyOwner, PropertyType::Binding)
 {
 }
 
@@ -25,11 +26,6 @@ void InternalBindingProperty::setExpression(const QString &expression)
     m_expression = expression;
 }
 
-bool InternalBindingProperty::isBindingProperty() const
-{
-    return true;
-}
-
 void InternalBindingProperty::setDynamicExpression(const TypeName &type, const QString &expression)
 {
     setExpression(expression);

src/plugins/qmldesigner/designercore/model/internalbindingproperty.h

@@ -12,6 +12,8 @@ class InternalBindingProperty : public InternalProperty
 {
 public:
     using Pointer = std::shared_ptr<InternalBindingProperty>;
+    static constexpr PropertyType type = PropertyType::Binding;
+
     InternalBindingProperty(const PropertyName &name, const InternalNodePointer &propertyOwner);
 
     bool isValid() const override;
@@ -21,8 +23,6 @@ public:
 
     void setDynamicExpression(const TypeName &type, const QString &expression);
 
-    bool isBindingProperty() const override;
-
 protected:
 
 private:

src/plugins/qmldesigner/designercore/model/internalnode.cpp

@@ -1,11 +1,14 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
+#include "internalbindingproperty.h"
 #include "internalnode_p.h"
-#include "internalproperty.h"
-#include "internalvariantproperty.h"
-#include "internalnodeproperty.h"
+#include "internalnodeabstractproperty.h"
 #include "internalnodelistproperty.h"
+#include "internalnodeproperty.h"
+#include "internalproperty.h"
+#include "internalsignalhandlerproperty.h"
+#include "internalvariantproperty.h"
 
 #include <QDebug>
 
@@ -111,111 +114,6 @@ AuxiliaryDatasForType InternalNode::auxiliaryData(AuxiliaryDataType type) const
     return data;
 }
 
-InternalProperty::Pointer InternalNode::property(const PropertyName &name) const
-{
-    return m_namePropertyHash.value(name);
-}
-
-InternalBindingProperty::Pointer InternalNode::bindingProperty(const PropertyName &name) const
-{
-    InternalProperty::Pointer property =  m_namePropertyHash.value(name);
-    if (property && property->isBindingProperty())
-        return std::static_pointer_cast<InternalBindingProperty>(property);
-
-    return InternalBindingProperty::Pointer();
-}
-
-InternalSignalHandlerProperty::Pointer InternalNode::signalHandlerProperty(const PropertyName &name) const
-{
-    InternalProperty::Pointer property =  m_namePropertyHash.value(name);
-    if (property->isSignalHandlerProperty())
-        return std::static_pointer_cast<InternalSignalHandlerProperty>(property);
-
-    return InternalSignalHandlerProperty::Pointer();
-}
-
-InternalSignalDeclarationProperty::Pointer InternalNode::signalDeclarationProperty(const PropertyName &name) const
-{
-    InternalProperty::Pointer property =  m_namePropertyHash.value(name);
-    if (property->isSignalDeclarationProperty())
-        return std::static_pointer_cast<InternalSignalDeclarationProperty>(property);
-
-    return InternalSignalDeclarationProperty::Pointer();
-}
-
-InternalVariantProperty::Pointer InternalNode::variantProperty(const PropertyName &name) const
-{
-    InternalProperty::Pointer property =  m_namePropertyHash.value(name);
-    if (property->isVariantProperty())
-        return std::static_pointer_cast<InternalVariantProperty>(property);
-
-    return InternalVariantProperty::Pointer();
-}
-
-void InternalNode::addBindingProperty(const PropertyName &name)
-{
-    auto newProperty = std::make_shared<InternalBindingProperty>(name, shared_from_this());
-    m_namePropertyHash.insert(name, newProperty);
-}
-
-void InternalNode::addSignalHandlerProperty(const PropertyName &name)
-{
-    auto newProperty = std::make_shared<InternalSignalHandlerProperty>(name, shared_from_this());
-    m_namePropertyHash.insert(name, newProperty);
-}
-
-void InternalNode::addSignalDeclarationProperty(const PropertyName &name)
-{
-    auto newProperty = std::make_shared<InternalSignalDeclarationProperty>(name, shared_from_this());
-    m_namePropertyHash.insert(name, newProperty);
-}
-
-InternalNodeListProperty::Pointer InternalNode::nodeListProperty(const PropertyName &name) const
-{
-    auto property = m_namePropertyHash.value(name);
-    if (property && property->isNodeListProperty())
-        return std::static_pointer_cast<InternalNodeListProperty>(property);
-
-    return {};
-}
-
-InternalNodeAbstractProperty::Pointer InternalNode::nodeAbstractProperty(const PropertyName &name) const
-{
-    InternalProperty::Pointer property =  m_namePropertyHash.value(name);
-    if (property && property->isNodeAbstractProperty())
-        return std::static_pointer_cast<InternalNodeAbstractProperty>(property);
-
-    return {};
-}
-
-InternalNodeProperty::Pointer InternalNode::nodeProperty(const PropertyName &name) const
-{
-    InternalProperty::Pointer property =  m_namePropertyHash.value(name);
-    if (property->isNodeProperty())
-        return std::static_pointer_cast<InternalNodeProperty>(property);
-
-    return {};
-}
-
-void InternalNode::addVariantProperty(const PropertyName &name)
-{
-    auto newProperty = std::make_shared<InternalVariantProperty>(name, shared_from_this());
-    m_namePropertyHash.insert(name, newProperty);
-}
-
-void InternalNode::addNodeProperty(const PropertyName &name, const TypeName &dynamicTypeName)
-{
-    auto newProperty = std::make_shared<InternalNodeProperty>(name, shared_from_this());
-    newProperty->setDynamicTypeName(dynamicTypeName);
-    m_namePropertyHash.insert(name, newProperty);
-}
-
-void InternalNode::addNodeListProperty(const PropertyName &name)
-{
-    auto newProperty = std::make_shared<InternalNodeListProperty>(name, shared_from_this());
-    m_namePropertyHash.insert(name, newProperty);
-}
-
 void InternalNode::removeProperty(const PropertyName &name)
 {
     InternalProperty::Pointer property = m_namePropertyHash.take(name);
@@ -248,13 +146,12 @@ QList<InternalNodeAbstractProperty::Pointer> InternalNode::nodeAbstractPropertyL
     const QList<InternalProperty::Pointer> properties = propertyList();
     for (const InternalProperty::Pointer &property : properties) {
         if (property->isNodeAbstractProperty())
-            abstractPropertyList.append(property->toNodeAbstractProperty());
+            abstractPropertyList.append(property->toProperty<InternalNodeAbstractProperty>());
     }
 
     return abstractPropertyList;
 }
 
-
 QList<InternalNode::Pointer> InternalNode::allSubNodes() const
 {
     QList<InternalNode::Pointer> nodeList;
@@ -278,4 +175,4 @@ QList<InternalNode::Pointer> InternalNode::allDirectSubNodes() const
 }
 
 } // namespace Internal
-}
+} // namespace QmlDesigner

src/plugins/qmldesigner/designercore/model/internalnode_p.h

@@ -44,8 +44,7 @@ public:
     using Pointer = std::shared_ptr<InternalNode>;
     using WeakPointer = std::weak_ptr<InternalNode>;
 
-    explicit InternalNode() = default;
-
+    InternalNode() = default;
     explicit InternalNode(TypeName typeName, int majorVersion, int minorVersion, qint32 internalId)
         : typeName(std::move(typeName))
         , majorVersion(majorVersion)
@@ -67,21 +66,100 @@ public:
     AuxiliaryDatasForType auxiliaryData(AuxiliaryDataType type) const;
     AuxiliaryDatasView auxiliaryData() const { return std::as_const(m_auxiliaryDatas); }
 
-    InternalProperty::Pointer property(const PropertyName &name) const;
-    InternalBindingProperty::Pointer bindingProperty(const PropertyName &name) const;
-    InternalSignalHandlerProperty::Pointer signalHandlerProperty(const PropertyName &name) const;
-    InternalSignalDeclarationProperty::Pointer signalDeclarationProperty(const PropertyName &name) const;
-    InternalVariantProperty::Pointer variantProperty(const PropertyName &name) const;
-    InternalNodeListProperty::Pointer nodeListProperty(const PropertyName &name) const;
-    InternalNodeAbstractProperty::Pointer nodeAbstractProperty(const PropertyName &name) const;
-    InternalNodeProperty::Pointer nodeProperty(const PropertyName &name) const;
+    template<typename Type>
+    typename Type::Pointer property(const PropertyName &name) const
+    {
+        auto property = m_namePropertyHash.value(name);
+        if (property && property->propertyType() == Type::type)
+            return std::static_pointer_cast<Type>(property);
 
-    void addBindingProperty(const PropertyName &name);
-    void addSignalHandlerProperty(const PropertyName &name);
-    void addSignalDeclarationProperty(const PropertyName &name);
-    void addNodeListProperty(const PropertyName &name);
-    void addVariantProperty(const PropertyName &name);
-    void addNodeProperty(const PropertyName &name, const TypeName &dynamicTypeName);
+        return {};
+    }
+
+    InternalProperty::Pointer property(const PropertyName &name) const
+    {
+        return m_namePropertyHash.value(name);
+    }
+
+    auto bindingProperty(const PropertyName &name) const
+    {
+        return property<InternalBindingProperty>(name);
+    }
+
+    auto signalHandlerProperty(const PropertyName &name) const
+    {
+        return property<InternalSignalHandlerProperty>(name);
+    }
+
+    auto signalDeclarationProperty(const PropertyName &name) const
+    {
+        return property<InternalSignalDeclarationProperty>(name);
+    }
+
+    auto variantProperty(const PropertyName &name) const
+    {
+        return property<InternalVariantProperty>(name);
+    }
+
+    auto nodeListProperty(const PropertyName &name) const
+    {
+        return property<InternalNodeListProperty>(name);
+    }
+
+    InternalNodeAbstractProperty::Pointer nodeAbstractProperty(const PropertyName &name) const
+    {
+        auto property = m_namePropertyHash.value(name);
+        if (property->propertyType() == PropertyType::NodeList
+            || property->propertyType() == PropertyType::Node) {
+            return std::static_pointer_cast<InternalNodeAbstractProperty>(property);
+        }
+        return {};
+    }
+
+    InternalNodeProperty::Pointer nodeProperty(const PropertyName &name) const
+    {
+        return property<InternalNodeProperty>(name);
+    }
+
+    template<typename Type>
+    auto &addProperty(const PropertyName &name)
+    {
+        auto newProperty = std::make_shared<Type>(name, shared_from_this());
+        auto inserted = m_namePropertyHash.insert(name, std::move(newProperty));
+
+        return *inserted->get();
+    }
+
+    void addBindingProperty(const PropertyName &name)
+    {
+        addProperty<InternalBindingProperty>(name);
+    }
+
+    void addSignalHandlerProperty(const PropertyName &name)
+    {
+        addProperty<InternalSignalHandlerProperty>(name);
+    }
+
+    void addSignalDeclarationProperty(const PropertyName &name)
+    {
+        addProperty<InternalSignalDeclarationProperty>(name);
+    }
+
+    void addNodeListProperty(const PropertyName &name)
+    {
+        addProperty<InternalNodeListProperty>(name);
+    }
+
+    void addVariantProperty(const PropertyName &name)
+    {
+        addProperty<InternalVariantProperty>(name);
+    }
+
+    void addNodeProperty(const PropertyName &name, const TypeName &dynamicTypeName)
+    {
+        auto &property = addProperty<InternalNodeProperty>(name);
+        property.setDynamicTypeName(dynamicTypeName);
+    }
 
     PropertyNameList propertyNameList() const;
 
@@ -105,13 +183,7 @@ public:
         return firstNode->internalId < secondNode->internalId;
     }
 
-    friend size_t qHash(const InternalNodePointer &node)
-    {
-        if (!node)
-            return ::qHash(-1);
-
-        return ::qHash(node->internalId);
-    }
+    friend size_t qHash(const InternalNodePointer &node) { return ::qHash(node.get()); }
 
 protected:
     void removeProperty(const PropertyName &name);

src/plugins/qmldesigner/designercore/model/internalnodeabstractproperty.cpp

@@ -7,16 +7,13 @@
 namespace QmlDesigner {
 namespace Internal {
 
-InternalNodeAbstractProperty::InternalNodeAbstractProperty(const PropertyName &name, const InternalNode::Pointer &propertyOwner)
-    : InternalProperty(name, propertyOwner)
+InternalNodeAbstractProperty::InternalNodeAbstractProperty(const PropertyName &name,
+                                                           const InternalNode::Pointer &propertyOwner,
+                                                           PropertyType propertyType)
+    : InternalProperty(name, propertyOwner, propertyType)
 {
 }
 
-bool InternalNodeAbstractProperty::isNodeAbstractProperty() const
-{
-    return true;
-}
-
 bool InternalNodeAbstractProperty::isValid() const
 {
     return InternalProperty::isValid() && isNodeAbstractProperty();

src/plugins/qmldesigner/designercore/model/internalnodeabstractproperty.h

@@ -17,8 +17,6 @@ public:
     using Pointer = std::shared_ptr<InternalNodeAbstractProperty>;
     using WeakPointer = std::weak_ptr<InternalNodeAbstractProperty>;
 
-    bool isNodeAbstractProperty() const override;
-
     virtual QList<InternalNodePointer> allSubNodes() const = 0;
     virtual QList<InternalNodePointer> directSubNodes() const = 0;
 
@@ -31,7 +29,9 @@ public:
     using InternalProperty::remove; // keep the virtual remove(...) function around
 
 protected:
-    InternalNodeAbstractProperty(const PropertyName &name, const InternalNodePointer &propertyOwner);
+    InternalNodeAbstractProperty(const PropertyName &name,
+                                 const InternalNodePointer &propertyOwner,
+                                 PropertyType propertyType);
     virtual void remove(const InternalNodePointer &node) = 0;
     virtual void add(const InternalNodePointer &node) = 0;
 };

src/plugins/qmldesigner/designercore/model/internalnodelistproperty.cpp

@@ -8,8 +8,9 @@
 namespace QmlDesigner {
 namespace Internal {
 
-InternalNodeListProperty::InternalNodeListProperty(const PropertyName &name, const InternalNodePointer &propertyOwner)
-        : InternalNodeAbstractProperty(name, propertyOwner)
+InternalNodeListProperty::InternalNodeListProperty(const PropertyName &name,
+                                                   const InternalNodePointer &propertyOwner)
+    : InternalNodeAbstractProperty(name, propertyOwner, PropertyType::NodeList)
 {
 }
 
@@ -36,11 +37,6 @@ int InternalNodeListProperty::indexOf(const InternalNode::Pointer &node) const
     return m_nodeList.indexOf(node);
 }
 
-bool InternalNodeListProperty::isNodeListProperty() const
-{
-    return true;
-}
-
 void InternalNodeListProperty::add(const InternalNode::Pointer &internalNode)
 {
     Q_ASSERT(!m_nodeList.contains(internalNode));

src/plugins/qmldesigner/designercore/model/internalnodelistproperty.h

@@ -15,6 +15,7 @@ class InternalNodeListProperty final : public InternalNodeAbstractProperty
 {
 public:
     using Pointer = std::shared_ptr<InternalNodeListProperty>;
+    static constexpr PropertyType type = PropertyType::NodeList;
 
     InternalNodeListProperty(const PropertyName &name, const InternalNodePointer &propertyOwner);
 
@@ -43,8 +44,6 @@ public:
         return *found;
     }
 
-    bool isNodeListProperty() const override;
-
     QList<InternalNodePointer> allSubNodes() const override;
     QList<InternalNodePointer> directSubNodes() const override;
     const QList<InternalNodePointer> &nodeList() const;

src/plugins/qmldesigner/designercore/model/internalnodeproperty.cpp

@@ -7,8 +7,9 @@
 namespace QmlDesigner {
 namespace Internal {
 
-InternalNodeProperty::InternalNodeProperty(const PropertyName &name, const InternalNode::Pointer &propertyOwner)
-    : InternalNodeAbstractProperty(name, propertyOwner)
+InternalNodeProperty::InternalNodeProperty(const PropertyName &name,
+                                           const InternalNode::Pointer &propertyOwner)
+    : InternalNodeAbstractProperty(name, propertyOwner, PropertyType::Node)
 {
 }
 
@@ -38,11 +39,6 @@ bool InternalNodeProperty::isValid() const
     return InternalProperty::isValid() && isNodeProperty();
 }
 
-bool InternalNodeProperty::isNodeProperty() const
-{
-    return true;
-}
-
 InternalNode::Pointer InternalNodeProperty::node() const
 {
     return m_node;

src/plugins/qmldesigner/designercore/model/internalnodeproperty.h

@@ -12,6 +12,7 @@ class InternalNodeProperty : public InternalNodeAbstractProperty
 {
 public:
     using Pointer = std::shared_ptr<InternalNodeProperty>;
+    static constexpr PropertyType type = PropertyType::Node;
 
     InternalNodeProperty(const PropertyName &name, const InternalNodePointer &node);
 
@@ -19,7 +20,6 @@ public:
     bool isEmpty() const override;
     int count() const override;
     int indexOf(const InternalNodePointer &node) const override;
-    bool isNodeProperty() const override;
 
     QList<InternalNodePointer> allSubNodes() const override;
     QList<InternalNodePointer> directSubNodes() const override;

src/plugins/qmldesigner/designercore/model/internalproperty.cpp

@@ -18,11 +18,13 @@ InternalProperty::InternalProperty() = default;
 
 InternalProperty::~InternalProperty() = default;
 
-InternalProperty::InternalProperty(const PropertyName &name, const InternalNode::Pointer &propertyOwner)
-     : m_name(name),
-     m_propertyOwner(propertyOwner)
+InternalProperty::InternalProperty(const PropertyName &name,
+                                   const InternalNode::Pointer &propertyOwner,
+                                   PropertyType propertyType)
+    : m_name(name)
+    , m_propertyOwner(propertyOwner)
+    , m_propertyType{propertyType}
 {
-    Q_ASSERT_X(!name.isEmpty(), Q_FUNC_INFO, "Name of property cannot be empty");
 }
 
 bool InternalProperty::isValid() const
@@ -35,90 +37,11 @@ PropertyName InternalProperty::name() const
     return m_name;
 }
 
-bool InternalProperty::isBindingProperty() const
-{
-    return false;
-}
-
-bool InternalProperty::isVariantProperty() const
-{
-    return false;
-}
-
-std::shared_ptr<InternalBindingProperty> InternalProperty::toBindingProperty()
-{
-    Q_ASSERT(std::dynamic_pointer_cast<InternalBindingProperty>(shared_from_this()));
-    return std::static_pointer_cast<InternalBindingProperty>(shared_from_this());
-}
-
-
-bool InternalProperty::isNodeListProperty() const
-{
-     return false;
-}
-
-bool InternalProperty::isNodeProperty() const
-{
-    return false;
-}
-
-bool InternalProperty::isNodeAbstractProperty() const
-{
-    return false;
-}
-
-bool InternalProperty::isSignalHandlerProperty() const
-{
-    return false;
-}
-
-bool InternalProperty::isSignalDeclarationProperty() const
-{
-    return false;
-}
-
-std::shared_ptr<InternalVariantProperty> InternalProperty::toVariantProperty()
-
-{
-    Q_ASSERT(std::dynamic_pointer_cast<InternalVariantProperty>(shared_from_this()));
-    return std::static_pointer_cast<InternalVariantProperty>(shared_from_this());
-}
-
 InternalNode::Pointer InternalProperty::propertyOwner() const
 {
     return m_propertyOwner.lock();
 }
 
-std::shared_ptr<InternalNodeListProperty> InternalProperty::toNodeListProperty()
-{
-    Q_ASSERT(std::dynamic_pointer_cast<InternalNodeListProperty>(shared_from_this()));
-    return std::static_pointer_cast<InternalNodeListProperty>(shared_from_this());
-}
-
-std::shared_ptr<InternalNodeProperty> InternalProperty::toNodeProperty()
-{
-    Q_ASSERT(std::dynamic_pointer_cast<InternalNodeProperty>(shared_from_this()));
-    return std::static_pointer_cast<InternalNodeProperty>(shared_from_this());
-}
-
-std::shared_ptr<InternalNodeAbstractProperty> InternalProperty::toNodeAbstractProperty()
-{
-    Q_ASSERT(std::dynamic_pointer_cast<InternalNodeAbstractProperty>(shared_from_this()));
-    return std::static_pointer_cast<InternalNodeAbstractProperty>(shared_from_this());
-}
-
-std::shared_ptr<InternalSignalHandlerProperty> InternalProperty::toSignalHandlerProperty()
-{
-    Q_ASSERT(std::dynamic_pointer_cast<InternalSignalHandlerProperty>(shared_from_this()));
-    return std::static_pointer_cast<InternalSignalHandlerProperty>(shared_from_this());
-}
-
-std::shared_ptr<InternalSignalDeclarationProperty> InternalProperty::toSignalDeclarationProperty()
-{
-    Q_ASSERT(std::dynamic_pointer_cast<InternalSignalDeclarationProperty>(shared_from_this()));
-    return std::static_pointer_cast<InternalSignalDeclarationProperty>(shared_from_this());
-}
-
 void InternalProperty::remove()
 {
     propertyOwner()->removeProperty(name());
@@ -135,7 +58,6 @@ void InternalProperty::setDynamicTypeName(const TypeName &name)
     m_dynamicType = name;
 }
 
-
 void InternalProperty::resetDynamicTypeName()
 {
    m_dynamicType.clear();

src/plugins/qmldesigner/designercore/model/internalproperty.h

@@ -6,7 +6,6 @@
 #include "qmldesignercorelib_global.h"
 
 #include <QVariant>
-#include <QSharedPointer>
 
 #include <memory>
 
@@ -25,9 +24,54 @@ class InternalNode;
 
 using InternalNodePointer = std::shared_ptr<InternalNode>;
 
+template<PropertyType propertyType>
+struct TypeLookup
+{};
+
+template<>
+struct TypeLookup<PropertyType::Binding>
+{
+    using Type = InternalBindingProperty;
+};
+
+template<>
+struct TypeLookup<PropertyType::Node>
+{
+    using Type = InternalNodeProperty;
+};
+
+template<>
+struct TypeLookup<PropertyType::NodeList>
+{
+    using Type = InternalNodeListProperty;
+};
+
+template<>
+struct TypeLookup<PropertyType::None>
+{};
+
+template<>
+struct TypeLookup<PropertyType::SignalDeclaration>
+{
+    using Type = InternalSignalDeclarationProperty;
+};
+
+template<>
+struct TypeLookup<PropertyType::SignalHandler>
+{
+    using Type = InternalSignalHandlerProperty;
+};
+
+template<>
+struct TypeLookup<PropertyType::Variant>
+{
+    using Type = InternalVariantProperty;
+};
+
 class QMLDESIGNERCORE_EXPORT InternalProperty : public std::enable_shared_from_this<InternalProperty>
 {
 public:
+    friend InternalNode;
     using Pointer = std::shared_ptr<InternalProperty>;
 
     InternalProperty();
@@ -37,21 +81,37 @@ public:
 
     PropertyName name() const;
 
-    virtual bool isBindingProperty() const;
-    virtual bool isVariantProperty() const;
-    virtual bool isNodeListProperty() const;
-    virtual bool isNodeProperty() const;
-    virtual bool isNodeAbstractProperty() const;
-    virtual bool isSignalHandlerProperty() const;
-    virtual bool isSignalDeclarationProperty() const;
+    bool isBindingProperty() const { return m_propertyType == PropertyType::Binding; }
+    bool isVariantProperty() const { return m_propertyType == PropertyType::Variant; }
+    bool isNodeListProperty() const { return m_propertyType == PropertyType::NodeList; }
+    bool isNodeProperty() const { return m_propertyType == PropertyType::Node; }
+    bool isNodeAbstractProperty() const
+    {
+        return m_propertyType == PropertyType::Node || m_propertyType == PropertyType::NodeList;
+    }
+    bool isSignalHandlerProperty() const { return m_propertyType == PropertyType::SignalHandler; }
+    bool isSignalDeclarationProperty() const
+    {
+        return m_propertyType == PropertyType::SignalDeclaration;
+    }
+    PropertyType propertyType() const { return m_propertyType; }
 
-    std::shared_ptr<InternalBindingProperty> toBindingProperty();
-    std::shared_ptr<InternalVariantProperty> toVariantProperty();
-    std::shared_ptr<InternalNodeListProperty> toNodeListProperty();
-    std::shared_ptr<InternalNodeProperty> toNodeProperty();
-    std::shared_ptr<InternalNodeAbstractProperty> toNodeAbstractProperty();
-    std::shared_ptr<InternalSignalHandlerProperty> toSignalHandlerProperty();
-    std::shared_ptr<InternalSignalDeclarationProperty> toSignalDeclarationProperty();
+    template<typename Type>
+    auto toProperty()
+    {
+        Q_ASSERT(std::dynamic_pointer_cast<Type>(shared_from_this()));
+        return std::static_pointer_cast<Type>(shared_from_this());
+    }
+
+    template<PropertyType propertyType>
+    auto to()
+    {
+        if (propertyType == m_propertyType)
+            return std::static_pointer_cast<typename TypeLookup<propertyType>::Type>(
+                shared_from_this());
+
+        return std::shared_ptr<typename TypeLookup<propertyType>::Type>{};
+    }
 
     InternalNodePointer propertyOwner() const;
 
@@ -62,12 +122,17 @@ public:
     void resetDynamicTypeName();
 
 protected: // functions
-    InternalProperty(const PropertyName &name, const InternalNodePointer &propertyOwner);
+    InternalProperty(const PropertyName &name,
+                     const InternalNodePointer &propertyOwner,
+                     PropertyType propertyType);
+
     void setDynamicTypeName(const TypeName &name);
+
 private:
     PropertyName m_name;
     TypeName m_dynamicType;
     std::weak_ptr<InternalNode> m_propertyOwner;
+    PropertyType m_propertyType = PropertyType::None;
 };
 
 } // namespace Internal

src/plugins/qmldesigner/designercore/model/internalsignalhandlerproperty.cpp

@@ -6,9 +6,11 @@
 namespace QmlDesigner {
 namespace Internal {
 
-InternalSignalHandlerProperty::InternalSignalHandlerProperty(const PropertyName &name, const InternalNodePointer &propertyOwner)
-    : InternalProperty(name, propertyOwner)
-{}
+InternalSignalHandlerProperty::InternalSignalHandlerProperty(const PropertyName &name,
+                                                             const InternalNodePointer &propertyOwner)
+    : InternalProperty(name, propertyOwner, PropertyType::SignalHandler)
+{
+}
 
 bool InternalSignalHandlerProperty::isValid() const
 {
@@ -24,11 +26,6 @@ void InternalSignalHandlerProperty::setSource(const QString &source)
     m_source = source;
 }
 
-bool InternalSignalHandlerProperty::isSignalHandlerProperty() const
-{
-    return true;
-}
-
 bool InternalSignalDeclarationProperty::isValid() const
 {
     return InternalProperty::isValid() && isSignalDeclarationProperty();
@@ -44,13 +41,9 @@ void InternalSignalDeclarationProperty::setSignature(const QString &signature)
     m_signature = signature;
 }
 
-bool InternalSignalDeclarationProperty::isSignalDeclarationProperty() const
-{
-    return true;
-}
-
-InternalSignalDeclarationProperty::InternalSignalDeclarationProperty(const PropertyName &name, const InternalNodePointer &propertyOwner)
-    : InternalProperty(name, propertyOwner)
+InternalSignalDeclarationProperty::InternalSignalDeclarationProperty(
+    const PropertyName &name, const InternalNodePointer &propertyOwner)
+    : InternalProperty(name, propertyOwner, PropertyType::SignalDeclaration)
 {
     setDynamicTypeName("signal");
 }

src/plugins/qmldesigner/designercore/model/internalsignalhandlerproperty.h

@@ -12,6 +12,7 @@ class InternalSignalHandlerProperty : public InternalProperty
 {
 public:
     using Pointer = std::shared_ptr<InternalSignalHandlerProperty>;
+    static constexpr PropertyType type = PropertyType::SignalHandler;
 
     InternalSignalHandlerProperty(const PropertyName &name, const InternalNodePointer &propertyOwner);
 
@@ -20,9 +21,6 @@ public:
     QString source() const;
     void setSource(const QString &source);
 
-    bool isSignalHandlerProperty() const override;
-
-
 private:
     QString m_source;
 };
@@ -31,6 +29,7 @@ class InternalSignalDeclarationProperty : public InternalProperty
 {
 public:
     using Pointer = std::shared_ptr<InternalSignalDeclarationProperty>;
+    static constexpr PropertyType type = PropertyType::SignalDeclaration;
 
     InternalSignalDeclarationProperty(const PropertyName &name,
                                       const InternalNodePointer &propertyOwner);
@@ -40,8 +39,6 @@ public:
     QString signature() const;
     void setSignature(const QString &source);
 
-    bool isSignalDeclarationProperty() const override;
-
 private:
     QString m_signature;
 };

src/plugins/qmldesigner/designercore/model/internalvariantproperty.cpp

@@ -6,8 +6,9 @@
 namespace QmlDesigner {
 namespace Internal {
 
-InternalVariantProperty::InternalVariantProperty(const PropertyName &name, const InternalNodePointer &node)
-        : InternalProperty(name, node)
+InternalVariantProperty::InternalVariantProperty(const PropertyName &name,
+                                                 const InternalNodePointer &node)
+    : InternalProperty(name, node, PropertyType::Variant)
 {
 }
 
@@ -21,11 +22,6 @@ void InternalVariantProperty::setValue(const QVariant &value)
     m_value = value;
 }
 
-bool InternalVariantProperty::isVariantProperty() const
-{
-    return true;
-}
-
 void InternalVariantProperty::setDynamicValue(const TypeName &type, const QVariant &value)
 {
      setValue(value);

src/plugins/qmldesigner/designercore/model/internalvariantproperty.h

@@ -12,6 +12,7 @@ class InternalVariantProperty : public InternalProperty
 {
 public:
     using Pointer = std::shared_ptr<InternalVariantProperty>;
+    static constexpr PropertyType type = PropertyType::Variant;
 
     InternalVariantProperty(const PropertyName &name, const InternalNodePointer &propertyOwner);
 
@@ -22,9 +23,6 @@ public:
 
     void setDynamicValue(const TypeName &type, const QVariant &value);
 
-    bool isVariantProperty() const override;
-
-
 private:
     QVariant m_value;
 };

src/plugins/qmldesigner/designercore/model/model.cpp

@@ -8,10 +8,13 @@
 
 #include "abstractview.h"
 #include "auxiliarydataproperties.h"
+#include "internalbindingproperty.h"
 #include "internalnodeabstractproperty.h"
 #include "internalnodelistproperty.h"
+#include "internalnodeproperty.h"
 #include "internalproperty.h"
 #include "internalsignalhandlerproperty.h"
+#include "internalvariantproperty.h"
 #include "metainfo.h"
 #include "nodeinstanceview.h"
 #include "nodemetainfo.h"
@@ -1131,7 +1134,7 @@ void ModelPrivate::deselectNode(const InternalNodePointer &node)
 void ModelPrivate::removePropertyWithoutNotification(const InternalPropertyPointer &property)
 {
     if (property->isNodeAbstractProperty()) {
-        const auto &&allSubNodes = property->toNodeAbstractProperty()->allSubNodes();
+        const auto &&allSubNodes = property->toProperty<InternalNodeAbstractProperty>()->allSubNodes();
         for (const InternalNodePointer &node : allSubNodes)
             removeNodeFromModel(node);
     }

src/plugins/qmldesigner/designercore/model/nodeabstractproperty.cpp

@@ -70,8 +70,9 @@ void NodeAbstractProperty::reparentHere(const ModelNode &modelNode,  bool isNode
     if (modelNode.hasParentProperty() && modelNode.parentProperty().isDynamic())
         return;
 
-    if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isNodeAbstractProperty())
-        privateModel()->removePropertyAndRelatedResources(internalNode()->property(name()));
+    auto internalProperty = internalNode()->property(name());
+    if (internalProperty && !internalProperty->isNodeAbstractProperty())
+        privateModel()->removePropertyAndRelatedResources(internalProperty);
 
     if (modelNode.hasParentProperty()) {
         Internal::InternalNodeAbstractProperty::Pointer oldParentProperty = modelNode.internalNode()->parentProperty();

src/plugins/qmldesigner/designercore/model/nodelistproperty.cpp

@@ -41,11 +41,9 @@ Internal::InternalNodeListPropertyPointer &NodeListProperty::internalNodeListPro
     if (m_internalNodeListProperty)
         return m_internalNodeListProperty;
 
-    if (internalNode()->hasProperty(name())) {
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isNodeListProperty())
-            m_internalNodeListProperty = internalProperty->toNodeListProperty();
-    }
+    auto internalProperty = internalNode()->nodeListProperty(name());
+    if (internalProperty)
+        m_internalNodeListProperty = internalProperty;
 
     return m_internalNodeListProperty;
 }
@@ -65,9 +63,7 @@ QList<ModelNode> NodeListProperty::toModelNodeList() const
         return {};
 
     if (internalNodeListProperty())
-        return internalNodesToModelNodes(m_internalNodeListProperty->toNodeListProperty()->nodeList(),
-                                         model(),
-                                         view());
+        return internalNodesToModelNodes(m_internalNodeListProperty->nodeList(), model(), view());
 
     return QList<ModelNode>();
 }

src/plugins/qmldesigner/designercore/model/nodeproperty.cpp

@@ -24,11 +24,10 @@ void NodeProperty::setModelNode(const ModelNode &modelNode)
     if (!modelNode.isValid())
         return;
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isNodeProperty()
-            && internalProperty->toNodeProperty()->node() == modelNode.internalNode())
-            return;
+    auto internalProperty = internalNode()->nodeProperty(name());
+    if (internalProperty
+        && internalProperty->node() == modelNode.internalNode()) { //check if oldValue != value
+        return;
     }
 
     if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isNodeProperty())
@@ -42,11 +41,9 @@ ModelNode NodeProperty::modelNode() const
     if (!isValid())
         return {};
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isNodeProperty())
-            return ModelNode(internalProperty->toNodeProperty()->node(), model(), view());
-    }
+    auto internalProperty = internalNode()->nodeProperty(name());
+    if (internalProperty) //check if oldValue != value
+        return ModelNode(internalProperty->node(), model(), view());
 
     return ModelNode();
 }

src/plugins/qmldesigner/designercore/model/signalhandlerproperty.cpp

@@ -32,16 +32,15 @@ void SignalHandlerProperty::setSource(const QString &source)
     if (source.isEmpty())
         return;
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isSignalHandlerProperty()
-            && internalProperty->toSignalHandlerProperty()->source() == source)
-
+    if (auto internalProperty = internalNode()->property(name())) {
+        auto signalHandlerProperty = internalProperty->to<PropertyType::SignalHandler>();
+        //check if oldValue != value
+        if (signalHandlerProperty && signalHandlerProperty->source() == source)
             return;
-    }
 
-    if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isSignalHandlerProperty())
-        privateModel()->removePropertyAndRelatedResources(internalNode()->property(name()));
+        if (!signalHandlerProperty)
+            privateModel()->removePropertyAndRelatedResources(internalProperty);
+    }
 
     privateModel()->setSignalHandlerProperty(internalNode(), name(), source);
 }
@@ -109,16 +108,15 @@ void SignalDeclarationProperty::setSignature(const QString &signature)
     if (signature.isEmpty())
         return;
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isSignalDeclarationProperty()
-            && internalProperty->toSignalDeclarationProperty()->signature() == signature)
-
+    if (auto internalProperty = internalNode()->property(name())) {
+        auto signalDeclarationProperty = internalProperty->to<PropertyType::SignalDeclaration>();
+        //check if oldValue != value
+        if (signalDeclarationProperty && signalDeclarationProperty->signature() == signature)
             return;
-    }
 
-    if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isSignalDeclarationProperty())
-        privateModel()->removePropertyAndRelatedResources(internalNode()->property(name()));
+        if (!signalDeclarationProperty)
+            privateModel()->removePropertyAndRelatedResources(internalProperty);
+    }
 
     privateModel()->setSignalDeclarationProperty(internalNode(), name(), signature);
 }

src/plugins/qmldesigner/designercore/model/variantproperty.cpp

@@ -36,27 +36,29 @@ void VariantProperty::setValue(const QVariant &value)
     if (isDynamic())
         qWarning() << "Calling VariantProperty::setValue on dynamic property.";
 
+    if (auto internalProperty = internalNode()->property(name())) {
+        auto variantProperty = internalProperty->to<PropertyType::Variant>();
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isVariantProperty()
-            && internalProperty->toVariantProperty()->value() == value
-            && dynamicTypeName().isEmpty())
-
+        //check if oldValue != value
+        if (variantProperty && variantProperty->value() == value
+            && variantProperty->dynamicTypeName().isEmpty()) {
             return;
-    }
+        }
 
-    if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isVariantProperty())
-        privateModel()->removePropertyAndRelatedResources(internalNode()->property(name()));
+        if (!variantProperty)
+            privateModel()->removePropertyAndRelatedResources(internalProperty);
+    }
 
     privateModel()->setVariantProperty(internalNode(), name(), value);
 }
 
 QVariant VariantProperty::value() const
 {
-    if (isValid() && internalNode()->hasProperty(name())
-        && internalNode()->property(name())->isVariantProperty())
-        return internalNode()->variantProperty(name())->value();
+    if (isValid()) {
+        auto property = internalNode()->variantProperty(name());
+        if (property)
+            return property->value();
+    }
 
     return QVariant();
 }
@@ -86,19 +88,18 @@ void VariantProperty::setDynamicTypeNameAndValue(const TypeName &type, const QVa
 
     Internal::WriteLocker locker(model());
 
-    if (internalNode()->hasProperty(name())) { //check if oldValue != value
-        Internal::InternalProperty::Pointer internalProperty = internalNode()->property(name());
-        if (internalProperty->isVariantProperty()
-            && internalProperty->toVariantProperty()->value() == value
-            && internalProperty->toVariantProperty()->dynamicTypeName() == type)
-
+    //check if oldValue != value
+    if (auto internalProperty = internalNode()->property(name())) {
+        auto variantProperty = internalProperty->to<PropertyType::Variant>();
+        if (variantProperty && variantProperty->value() == value
+            && internalProperty->dynamicTypeName() == type)
             return;
+
+        if (!variantProperty)
+            privateModel()->removePropertyAndRelatedResources(internalProperty);
     }
 
-    if (internalNode()->hasProperty(name()) && !internalNode()->property(name())->isVariantProperty())
-        privateModel()->removePropertyAndRelatedResources(internalNode()->property(name()));
-
-   privateModel()->setDynamicVariantProperty(internalNode(), name(), type, value);
+    privateModel()->setDynamicVariantProperty(internalNode(), name(), type, value);
 }
 
 void VariantProperty::setDynamicTypeNameAndEnumeration(const TypeName &type, const EnumerationName &enumerationName)